Custom checks in every tool handler
Fine at first, until a new action path appears and the logic starts spreading again.
Action safety for production agents
Stop duplicate AI agent actions before they hit real systems
ActOnce sits between agent intent and side effects, blocking duplicate emails, tickets, refunds, bookings, CRM updates, and workflow triggers before they happen.
Keep retries, queues, and webhooks turned on. ActOnce gives you one clean control layer for safe actions in production, without brittle one-off dedupe logic scattered across your stack.
Built for engineering-led teams shipping support, CRM, and workflow agents into production.
- Support agents
- CRM agents
- Workflow agents
- Retries without repeated side effects
Dedicated action guard Check side effects before your agent touches live systems.
Retries can stay on Preserve reliability without multiplying tickets, emails, or downstream triggers.
One pattern across the stack Stop rebuilding dedupe logic in handlers, workers, jobs, and workflow code.
The problem
Your agent succeeded. Then the retry succeeded too.
Most failures here are not dramatic. They are repetitive, expensive, and surprisingly common.
A model retries. A worker restarts. A queue redelivers. A webhook arrives twice. A timeout leaves the system unsure whether the action succeeded.
- sent the same customer email twice
- created two support tickets
- issued two refunds
- added duplicate notes to the CRM
- triggered the same downstream workflow again
That is how teams end up doing manual cleanup, answering awkward customer questions, and trusting their automations less every time something weird happens.
Why current fixes wear out
Most teams solve this in fragments
Ad hoc database lookups
Quick to add, hard to standardise, and rarely consistent across every action type.
Workflow guards that miss edge cases
Helpful in places, but usually not enough to protect every side effect cleanly.
Retries turned down out of caution
Less scary in the short term, but often worse for reliability over time.
How it works
One calm checkpoint before a real-world action happens
You keep your existing agents and workflows. When an action could change the outside world, your app asks ActOnce whether it should proceed.
1
The agent decides to act
For example, send an email, create a ticket, issue a refund, or trigger a workflow.
2
Your app sends ActOnce a stable action key
The request includes the key plus the context needed to identify that exact action attempt.
3
ActOnce checks whether it is already known
If the action has already been accepted or completed, the repeat is recognised immediately.
4
New actions go through, repeats do not
The first valid attempt proceeds. Duplicate attempts are blocked or handled safely before the side effect repeats.
Normal path
1 Trigger source Queue, webhook, retry
2 Agent / app Requests an action
3 ActOnce Checks action key and status
4 External system Email, ticket, refund, booking
Duplicate request arrives again
Blocked or safely handled before the side effect repeats
// conceptual example only
attemptAction({
actionKey: "ticket:create:org_42:user_918:issue_7",
actionType: "support.ticket.create",
payload: { /* action context */ }
})
// if already accepted or completed,
// duplicate execution is blocked or handled safely
What your team gets
- retries that stay enabled
- fewer customer-facing mistakes
- less scattered dedupe code
- clearer control over production agent behaviour
- more confidence when shipping live actions
Use cases
Where duplicate actions show up first
Support agents
Prevent duplicate replies, repeated ticket creation, repeated escalations, and noisy status changes.
CRM agents
Stop repeated contact updates, notes, tasks, ownership changes, and follow-up sequences.
Operations and workflow agents
Guard against repeated bookings, approvals, internal notifications, and downstream automation triggers.
Human-in-the-loop systems
Protect side effects when work passes across queues, workers, review steps, and humans.
Why now
As soon as agents touch live systems, duplicate actions become an operational problem
Teams are moving from internal demos to production agents that can message customers, update systems of record, and trigger live workflows.
The modern stack, including queues, retries, webhooks, workflow runners, and LLM tool calls, makes repetition likely. The real question is not whether duplicates can happen. It is whether you have a reliable layer to stop them.
Build vs buy
You can build it yourself. The question is whether you want to own it forever.
Most teams start with a few custom guards and tell themselves that is enough. Then the agent surface area grows, more actions get added, edge cases multiply, and the same protection pattern has to be rebuilt across handlers, jobs, queues, and workflow logic.
ActOnce gives you a dedicated layer for this job, so every new agent action does not reopen the same engineering problem. Instead of stitching together one-off protections, your team gets a consistent place to check, control, and reason about duplicate side effects.
- ship retries with more confidence
- reduce duplicate customer-facing mistakes
- avoid rebuilding the same guard pattern across services
- give engineering and ops one clearer control point
- scale agent usage without turning side effects into cleanup work
This should feel like infrastructure, not glue code.
Pricing
Simple pricing based on protected actions
Pay for the thing that matters: real-world actions protected from duplicate execution, not vague seat counts or bloated platform pricing.
Starter
$39/mo
Best for teams validating one live use case without building everything from scratch.
- up to 100k protected actions per month
- 1 production environment
- 7-day logs
- email support
Most likely fit
Growth
$149/mo
Best for early production teams that want confidence before duplicate-action cleanup gets expensive.
- up to 1M protected actions per month
- up to 3 environments
- 30-day logs
- team access
- priority email support
Scale
$499/mo
Best for higher-volume teams where duplicate actions become an operational and trust problem.
- up to 5M protected actions per month
- multiple environments or projects
- 90-day logs
- audit-friendly visibility
- priority support
Start with the actions that carry the most operational risk, then expand coverage as agent usage grows.
Need higher volume, custom security review, procurement support, or SLA terms? Contact us for enterprise pricing.
FAQ
Questions technical teams will ask
Engineers do not need hand-waving here. They want clear answers on retries, idempotency, framework fit, and whether this problem really exists outside payments.
What is ActOnce?
ActOnce is an API product focused on preventing duplicate real-world actions from AI agents in production.
Who is it for?
Teams shipping support, CRM, and operations agents, especially engineering-led startups and product teams.
What kinds of actions does it help with?
Examples include emails, ticket creation, refunds, bookings, CRM updates, and workflow triggers.
Does ActOnce replace retries?
No. The goal is to make retries safer, not remove them.
Why not just use idempotency keys everywhere?
You should use them where they exist. The problem is that not every downstream system offers good idempotency support, and most teams do not want different protection patterns for every tool or provider.
Is this only for payments?
No. Payments made idempotency famous, but support, CRM, and operations agents hit the same issue constantly.
Does this depend on one agent framework?
ActOnce is being positioned as infrastructure around agent actions rather than something tied to one framework. Exact integrations can evolve.
Is there enterprise pricing?
Yes. Teams with higher volume, custom security requirements, procurement steps, or SLA needs can contact ActOnce for a custom package.
Join Waitlist
Ship agents that can retry without causing a mess
Join the waitlist for early access, launch updates, and the first production-ready release.
This is for technical teams with a real duplicate-action problem, not passive newsletter subscribers. Tell us your use case so we can prioritise the right early users.
Join the ActOnce waitlist
Tell us what you are trying to protect so early access can be shaped around real production use cases.
We review every request manually and prioritise teams with real production use cases.
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